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Radium's lustrous surface rapidly becomes black upon exposure to air, likely due to the formation of radium nitride (Ra 3 N 2). [5] Its melting point is either 700 °C (1,292 °F) or 960 °C (1,760 °F) [a] and its boiling point is 1,737 °C (3,159 °F); however, this is not well established. [6]
The Gmelin rare earths handbook lists 1522 °C and 1550 °C as two melting points given in the literature, the most recent reference [Handbook on the chemistry and physics of rare earths, vol.12 (1989)] is given with 1529 °C.
88 Ra radium; use: 2010 K: 1737 °C: 3159 °F WebEl: 2010 K: ... For the equivalent in degrees Fahrenheit °F, see: Boiling points of the elements ... Melting points ...
88 Ra radium; use: 8.5 LNG: 8.5 WEL: about 8 89 ... Values refer to the enthalpy change between the liquid phase and the most stable solid phase at the melting point ...
88 Ra radium; use (T/K) 819 906 1037 1209 1446 ... The temperature at standard pressure should be equal to the normal boiling point, ... f - Ohse, R.W. Handbook of ...
Most of the chemistry has been observed only for the first five members of the group. The chemistry of radium is not well-established due to its radioactivity; [2] thus, the presentation of its properties here is limited. The alkaline earth metals are all silver-colored and soft, and have relatively low densities, melting points, and boiling ...
88 Ra radium; use: 113 LNG: 113 WEL: about 125 89 Ac actinium; ... Values refer to the enthalpy change in the conversion of liquid to gas at the boiling point (normal ...
Melting points (in blue) and boiling points (in pink) of the first eight carboxylic acids (°C). For most substances, melting and freezing points are approximately equal. For example, the melting and freezing points of mercury is 234.32 kelvins (−38.83 °C; −37.89 °F). [2]